Steam-generator.



No. Patented Feb. I2, |901. H. BRA'BY. STEAM GENERATGR.

(Application led May 11, 1900.)

4 Sheets-Sheet I.

(No Model.)

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No. 668mm. Patented Feb. I2, |90I.

H. BRABY.

STEAM GENERATOR.

V` (Application led May 11, 1900.) (No Modem 4 Sheets-Sheet 2.

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Patented Feb. 12,1901.

STEAM GENERATOR.

(Application led May 11, 1900.)

4 Sheets-Sheet 3.

(No Model.)

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Patented Feb. I2, l90l.

H. BRABY.

STEAM GENERTUR.

(Application led May l1, 1900.)

4 sheets-sheet 4,

(No Model.)

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lil etarras Patent @ittica HENRY BRABY, OF AYR, QUEENSLAND.

STEAM-GENEHATR.I

SPECFICATIlUll forming part of Letters Patent No. 668,006, dated February 12, 1901.

Application tiled May l1, 1900. Serial No. 16,355. (No modem le it knoivn that l, HENRY BRABY, a subject ofthe Queen of Great Britain, and a resident of Ayr, in the county of Gladstone and Colony ol Queensland, have invented certain new and useful Improvements in Steam-Generators, (for Which l have applied for patents in Queensland, No. 5,234, filed October 20, 1800; in New South lVales,1lo. 9,897, filed .l'anuary 12, 1000; in South Australia, No. 45,320, tiled January 10, 1900; in Western Australia, No. 2,826, f1led January 10, 1900; in New Zealand, No. 12,324, tiled January 18, 1000, and in Victoria, No. 16,002, tiled February 5, 1000,) of which the following is a description.

This invention is for generating steam by passing or circulating water through a Waterwayor passage formed in one or more blocks or plaies of copper, gun-metal, or other goed heat-conductor While under the application of heat.

My invention is based on the theory that the rate of transmission of heat by Water-heating surfaces is proportional to the difference between t-he temperature of the plates, due to combustion on the outside, and that of the Water in the interior of the plates, together with the heat-transmissive power of the metal as a heat-conducting medium, and that no more Water should be brought into contact with t-he heating-surfaces Within a given time than can be converted Within that time. The extra thickness of metal is also an advantage in that it acts as an accumulatoror storage of heat.

lVith my generator steam can be raised in a comparatively short time, While there is t great economy in the consumption of fuel.

There is also little or no possibility of eXplosion or danger to life in the event of an accident, more especially as there is no storage of boiling Water under pressure.

1n proportion to its efficiency for raising steam the generator is very light, occupies little space, a nd requires slight attention, While it is easily kept clean.

According to my invention l provide one or more generator blocks or plates, of good heat-conducting material, having passages or Waterways therein through which the Water is made to circulate. One or more of the plates may be perforated, through which perforations or holes part of the furnace heat is made to pass. The caps, which return the waterways and gire access for cleaning purposes, are jointed, preferably, by means of asbestos rings recessed into the plates. I provide a back-pressure valve for the Waterinlet froin a feed-pump or injector and preferably a back-pressure valve for the steamoutlet,\vhich may lead to an equalizcror dome, from which a pipe connects to an engine or other steam-consu mer. A return Water-pipe provided with a check-valve leads from the equalizer to the water-inlet. The equalizer is so situated over the furnace or combustionchamber as to receive part of its heat.

ln the accompanying drawings, Figure 1 is a plan, Fig. 2 a front elevation, and Fig. 3 a side elevation, partly in section, of a generator having a comparatively large steam-raising capacity. Fig. 4E is a plan, Fig. 5 a side elevation, Fig. 6 an end elevation, and Fig. 7 a section through the line a; y, Fig. 4,-, of a generator plate or block, while Fig. 8 is a plan, and Fig. 9 an elevation, of a simple form of generator suitable for driving small motors and preferably heated by a liquidfuel burner.

The same reference-letters indicate the same or corresponding parts.

In the apparatus shown in Figs. 1 to 7, A', A2, A3, A4, A5,and Aare thegenerator-plates, having the passages or Waterways A7, one or more of the plates being perforated for the passage of a portion of the heat from the furnace or other source. B is the Water-inlet and C the steam-outlet connecting pipes. D represents the caps, preferably of cast-iron, which return the Waterways and give access for cleaning purposes, being jointed by asbestos rings D', recessed into the plates, as shown in Figs. 4, 5, and E is the back-pressure valve for the water-inlet from the feed-pu tn p, While F is the back-pressure valve for the steam-outlet to the equalizer or dome G. H is the connecting steam-pipe to the equalizer. I is the connecting-pipe from the equalizer to the engine or othersteam-consumer. Jis the return Water or drain pipe from the equalizer to the Water-inlet pipe, and K the check-valve IDG L is a safety-valve, M a pres-y O is a furnace, and O2 a chimney. U V are try-cocks.

The following shows the working of the apparatus shown in Figs. l to 7: The Water is forced through the inlet-valve E and pipe B into the waterways A7 in the generator-plate A and thence through the Waterways in the plates A2, A3, A4, A5, and A, and being vaporized passes outlet C and the delivery backpressure valve F as superheated steam and thence by the connecting-pipe H to the equalizer G.

It is necessary to keep upa constant circulation of water preferably by means of a feedpump of the double-ram type. Hot-Water feed is preferably used and the supply regulated by means of a supply-cock fitted with a graduated circle-plate and pointer.

If at any time too much Water be forced into the generator, it will be detected in the equalizer by means of the water-gage N and will return automatically through the pipe J to the generator, when the supply from the pump is reduced,or it can he returned to the feed tank. Should insufficient water be passed into the generator, it would merely result in less steam being generatedand anincrease in the temperature of the generator, Which heat is given back when the water-su pply is increased.

ln the apparatus illustrated in Figs. 8 and 9 A' is the generator-plate. A7 represents the Waterways through which the Water and steam circulates. B shows the inlet and C the outlet connecting pipes. D represents the caps, preferably of gun-metal, for returning the waterways A7. E is the back-pressure valve for the water-inlet. G is the equalizer, and H the pipe leading from the generator to the equalizer. I is the connecting-pipe from the generator to the engine. .I is the return Water or drain pipe from the equalizer. K is the check-valve on the return water-pipe. L is a safety-valve. O is the combustion-charnber, consisting of a wrought-iron box lined With fire-bricks, tiles, or asbestos composition. P is a plate or tile composed of lireclay or asbestos composition, on which the heat first impinges. B is a liquid-fuel injector or burner of any suitable kind. S represents slits or spaces through which the heat ascends from the combustion-chamber. U V are try-cocks for ascertaining whether there is water in the equalizer and Waterways, respectively. W represents perforations around the base of the equalizer for circulation of heat below the dished bottom. The operation of this apparatus is as follows: The burner is started,and at the same time water is forcedinto the waterways A of the generatorplate. As soon as steam-pressure is obtained the feed-pump or injector is started to keep up 'the circulation of Water, and steam is generated, as hereinbefore described.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is y l. In a steam-generator, the combination of a plate or block having parallel passages extending therethrough and caps or end por tions provided With passages adapted to form continuations of the passages of said block or plate, substantially as set forth.

2. In a steam-generator, the combination of a plate or block having parallel passages extending therethrough, and caps or end portions having passages adapted to form continuatious of the passages of said plate or block, said plate or block also having a series of channels or perforations traversing it in- 4 termediately, and in lines at right angles to the longitudinal. plane, of its passages, substantially as set forth.

3. In a steam-generator, the combination of a furnace-chamber, a plate or block having a series of parallel passages extending therethrough, end portions or caps having passages adapted to form eontinuations of the passages of said block or plate, an equalizer or dome arranged upon said furnace-chamber, pipe connections between the block or plate pas sages and said equalizer, and inlet and outlet valves supplied to said pipe connections, substantially as set forth.

In Witness whereof I have hereunto set my hand in the presence-of two witnesses.

HENRY BRABY.

Witnesses:

THOMAS BURLTON IRVING, J oHN DossE'rT. 

